The production of tritium during the electrolysis of aqueous carbonate solutions using nickel
cathodes and platinum anodes first reported by us in Nagoya has been verified and confirmed
once again using freshly setup cells and a newly acquired dedicated tritium counting setup.
During these experiments, adequate precautions were taken to rule out any possibility of
contamination from stray sources of tritium, if any. During 1993, 10 out of 23 cells indicated the
generation of tritium at levels in the range of 0.5 to 4.8 Bq/ml. However, the magnitude of
tritium activity in the post-Nagoya experiments is significantly lower. Electrolytic enrichment of
the tritium isotope cannot account for this in view of the low currents, above ambient
temperature of cell operation, and the addition of makeup water to maintain original solution
levels. The generation of tritium in Ni-H20 cells has since been corroborated by Notoya et al.4 at
the International Conference on Cold Fusion4.
Of the OM series cells whose electrolytes were sampled and counted frequently, three cells
(inclusive of OM-3) indicated tritium levels well above background counts. Interestingly, all of
these three cells, which were sampled and counted periodically, have displayed a characteristic
oscillatory variation of the tritium activity. While an in-crease in tritium level can be understood
as a production phase, the decreasing phase, lasting from 5 to 10 days (in one case up to 20 days),
is difficult to understand. A close scrutiny of our sampling, distilling, and counting techniques
confirms that the decrease in tritium level is genuine and not attributable to any artifact. We are
strongly tempted to suggest that there is an as yet unidentified mechanism periodically
“cleansing” the electrolyte of tritium. Oscillatory behavior of tritium level in Pd-D2O electrolytic
cells has also been reported by three other independent groups.5-7 It is puzzling that the tritium
activity of the electrolytes of both Pd-D2O and Ni-H2O electrolysis cells seems to vary in an
analogous oscillatory fashion.